It is recommended to hire an professional to install a cat-flap inside your home. DIY jobs usually result in poorly-fitted pet flaps which allow drafts and result in more energy costs. SheffLOCK is able to install a cat flap on all kinds of doors, such as wood, glass, uPVC composites https://catflapdoubleglazing45911.topbloghub.com/37112502/using-a-cat-flap-in-bifold-doors